Using add-ons for commercial use
FAQ — blender.org

Can I use Blender commercially?
Yes you can. Any creation you make as an artist with Blender is your sole property, and can be applied for any purpose you choose to. This also applies the Add-ons and Python scripts you write for Blender.
If you like to distribute Blender itself, you have to be aware of the GPL rules, which basically means you have to make sources for Blender available as well. However, in general it’s sufficient to provide information that forwards to blender.org.

All software nowadays should contain licenses, no exception for Blender. License — blender.org, which the licenses of Blender itself is basically using GNU V2 and V3 but some of the component is a slightly strict license. eg. Cycles: Apache 2.0
If your usage contain any modification of Blender and redistribute it with commercial license, it will probably cause some problem since that's not what GNU wanted. But if your just using Blender to creating content, it will be fine.
And there's also an interest point is that, Sharing Blender or Blender add-ons or scripts is always OK and not considered piracy.